{
  "method": "GPUs: eBay Browse API median asking, active used listings (auto, monthly). Macs: hand-verified (used supply too thin to auto-median).",
  "items": [
    {
      "id": "rtx-3090-used",
      "name": "NVIDIA RTX 3090 24GB",
      "query": "NVIDIA+RTX+3090+24GB",
      "history": [
        {
          "date": "2026-06-14",
          "price": 1400,
          "source": "eBay Browse API median asking (157 active used listings)"
        },
        {
          "date": "2026-07-01",
          "price": 1400,
          "source": "eBay Browse API median asking (160 active used listings)"
        },
        {
          "date": "2026-08-01",
          "price": 1300,
          "source": "eBay Browse API median asking (155 active used listings)"
        },
        {
          "date": "2026-09-01",
          "price": 1655,
          "source": "eBay Browse API median asking (154 active used listings)"
        }
      ]
    },
    {
      "id": "rtx-4090-used",
      "name": "NVIDIA RTX 4090 24GB",
      "query": "NVIDIA+RTX+4090+24GB",
      "history": [
        {
          "date": "2026-06-14",
          "price": 3145,
          "source": "eBay Browse API median asking (132 active used listings)"
        },
        {
          "date": "2026-07-01",
          "price": 3000,
          "source": "eBay Browse API median asking (152 active used listings)"
        },
        {
          "date": "2026-08-01",
          "price": 3000,
          "source": "eBay Browse API median asking (155 active used listings)"
        },
        {
          "date": "2026-09-01",
          "price": 3600,
          "source": "eBay Browse API median asking (101 active used listings)"
        }
      ]
    },
    {
      "id": "rtx-a6000-used",
      "name": "NVIDIA RTX A6000 48GB",
      "query": "NVIDIA+RTX+A6000+48GB",
      "history": [
        {
          "date": "2026-06-14",
          "price": 4260,
          "source": "eBay Browse API median asking (48 active used listings)"
        },
        {
          "date": "2026-07-01",
          "price": 4000,
          "source": "eBay Browse API median asking (51 active used listings)"
        },
        {
          "date": "2026-08-01",
          "price": 4300,
          "source": "eBay Browse API median asking (41 active used listings)"
        },
        {
          "date": "2026-09-01",
          "price": 4825,
          "source": "eBay Browse API median asking (26 active used listings)"
        }
      ]
    },
    {
      "id": "tesla-p40-used",
      "name": "NVIDIA Tesla P40 24GB",
      "query": "NVIDIA+Tesla+P40+24GB",
      "history": [
        {
          "date": "2026-06-14",
          "price": 300,
          "source": "eBay Browse API median asking (115 active used listings)"
        },
        {
          "date": "2026-07-01",
          "price": 300,
          "source": "eBay Browse API median asking (103 active used listings)"
        },
        {
          "date": "2026-08-01",
          "price": 300,
          "source": "eBay Browse API median asking (131 active used listings)"
        },
        {
          "date": "2026-09-01",
          "price": 305,
          "source": "eBay Browse API median asking (146 active used listings)"
        }
      ]
    },
    {
      "id": "mi50-32gb-used",
      "name": "AMD Instinct MI50 32GB",
      "query": "AMD+Instinct+MI50+32GB",
      "history": [
        {
          "date": "2026-06-14",
          "price": 585,
          "source": "eBay Browse API median asking (30 active used listings)"
        },
        {
          "date": "2026-07-01",
          "price": 585,
          "source": "eBay Browse API median asking (28 active used listings)"
        },
        {
          "date": "2026-08-01",
          "price": 590,
          "source": "eBay Browse API median asking (22 active used listings)"
        },
        {
          "date": "2026-09-01",
          "price": 600,
          "source": "eBay Browse API median asking (25 active used listings)"
        }
      ]
    },
    {
      "id": "mac-studio-m1-ultra-used",
      "name": "Mac Studio M1 Ultra 128GB",
      "query": "Apple+Mac+Studio+M1+Ultra+128GB",
      "history": [
        {
          "date": "2026-06-13",
          "price": 2300,
          "source": "hand-verified typical used price"
        }
      ]
    },
    {
      "id": "mac-studio-m2-ultra-used",
      "name": "Mac Studio M2 Ultra 192GB",
      "query": "Apple+Mac+Studio+M2+Ultra+192GB",
      "history": [
        {
          "date": "2026-06-13",
          "price": 4200,
          "source": "hand-verified typical used price"
        }
      ]
    }
  ],
  "updated": "2026-09-01"
}